Array substrate and display device for implementing 2d/3d display switch and method for driving display device

ABSTRACT

The present disclosure provides an array substrate for implementing 2D/3D display switch. The array substrate includes M*N pixel units arranged in an array form, and M and N are positive integers. Each pixel unit includes at least a first pixel subunit A and a second pixel subunit B, the M*N pixel units include at least 2M*N pixel subunits. During the 2D display, the first pixel subunit A and the second pixel subunit B of the pixel unit in an m th  row display identical image information, m is a positive integer less than or equal to M. During the 3D display, the first pixel subunit A of the pixel unit in the m th  row and the second pixel subunit B of the pixel unit in an (m−1) th  row display identical image information, and m is an integer greater than 1 and less than or equal to M.

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims a priority of the Chinese patent application No. 201310752464.3 filed on Dec. 31, 2013, which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to the field of display technology, in particular to an array substrate and a display device for implementing 2D/3D display switch, and a method for driving the display device.

BACKGROUND

Currently, the display technology has progressed from 2D display to 3D display. In order to meet various requirements of users, a 2D/3D display switch technique, which enables the display of an image in a 2D or 3D mode according to the users' requirements, has become a new trend for a stereo display device.

Parallax baffle 3D display is the most common 3D display technique at present, and FIG. 1 shows its structure and principle, where an array substrate 1 and a parallax baffle 2 are provided. The parallax baffle 2 is arranged in front of or behind the array substrate 1, and consists of nonopaque regions 21 and parallax barriers 22 arranged at a regular interval. Different images are viewed through the parallax barrier 2 by left and right eyes of a viewer, so the 3D image display is achieved.

Based on the above-mentioned 3D display principle, an active barrier is usually used in the prior art so as to implement the 2D/3D display switch. As shown in FIG. 2, the active barrier 3, as a liquid crystal panel with a twisted nematic (TN) mode, is arranged in front of a display unit and includes an upper substrate 31, a lower substrate 32, a first electrode 33, a second electrode 34 and a liquid crystal layer 35 arranged between the first electrode 33 and the second electrode 34. When the first electrode 33 is electrically connected to the second electrode 34, a slit grating structure, in which the nonopaque regions and the parallax barriers are arranged at a regular interval, is formed, so as to achieve the 3D display. When the first electrode 33 is not electrically connected to the second electrode 34, the light can be transmitted so as to achieve the 2D display.

However, the active barrier with the structure as shown in FIG. 2 is very expensive, and has thus become a major obstacle to marketing the display device with a 2D/3D display switch function.

SUMMARY

An object of the present disclosure is to provide an array substrate and a display device for implementing 2D/3D display switch, and a method for driving the display device, so as to simplify the structure of the display device and facilitate the implementation of the structure, thereby to reduce the production cost.

In one aspect, the present disclosure provides an array substrate for implementing 2D/3D display switch, including M*N pixel units arranged in an array form, M and N being positive integers. Each pixel unit includes at least a first pixel subunit A and a second pixel subunit B, and the M*N pixel units include at least 2M*N pixel subunits. During the 2D display, the first pixel subunit A and the second pixel subunit B of the pixel unit in an m^(th) row display identical image information, m is a positive integer less than or equal to M. During the 3D display, the first pixel subunit A of the pixel unit in the m^(th) row and the second pixel subunit B of the pixel unit in an (m−1)^(th) row display identical image information, and m is an integer greater than 1 and less than or equal to M.

Alternatively, in each pixel unit, the first pixel subunit A and the second pixel subunit B are of an identical shape, size, and color to be displayed. Alternatively, the shape, size and color to be displayed of the first pixel subunit A and the second pixel subunit B are determined in accordance with a design requirement of the array substrate.

In another aspect, the present disclosure provides a display device for implementing 2D/3D display switch, including

an array substrate including M*N pixel units arranged in an array form, M and N being positive integers, each pixel unit including at least a first pixel subunit A and a second pixel subunit B, the M*N pixel units including at least 2M*N pixel subunits, during the 2D display, the first pixel subunit A and the second pixel subunit B of the pixel unit in an m^(th) row displaying identical image information, m being a positive integer less than or equal to M, during the 3D display, the first pixel subunit A of the pixel unit in the m^(th) row and the second pixel subunit B of the pixel unit in an (m−1)^(th) row displaying identical image information, and m being an integer greater than 1 and less than or equal to M; and

a parallax baffle arranged opposite to the array substrate and including a plurality of opaque parallax barriers, a nonopaque region being formed between two adjacent parallax barriers, the parallax barriers in adjacent rows being arranged in a staggered manner, the parallax barrier corresponding to a portion of the first pixel subunit A of the pixel unit in an x^(th) row and a (y−1)^(th) column and a portion of the second pixel subunit B of the pixel unit in an (x−1)^(th) row and a (y−1)^(th) column, x and y being each an integer greater than 1 and less than or equal to M.

Alternatively, the parallax barrier also corresponds to a portion of the first pixel subunit A of the pixel unit in the x^(th) row and a y^(th) column and a portion of the second pixel subunit B of the pixel unit in the (x−1)^(th) row and the y^(th) column.

Alternatively, the parallax barrier has a height equal to a sum of heights of the first pixel subunit A and the second pixel subunit B.

Alternatively, the parallax barrier in each row is offset by a predetermined offset amount relative to a corresponding parallax barrier in an adjacent row.

Alternatively, the parallax barrier and the corresponding parallax barrier in the adjacent row are two parallax barriers with a minimum distance from each other in the adjacent two rows along a horizontal direction of the rows.

Alternatively, the predetermined offset amount is half a width of a grating unit, and the width of the grating unit is equal to a sum of widths of the parallax barrier and the nonopaque region.

Alternatively, when the display device has S viewpoints, the pixel unit includes S pixel subunits, the predetermined offset amount is greater than or equal to a width of one pixel subunit and less than widths of S pixel subunits, and S is a positive integer.

Alternatively, the parallax barrier is arranged at a light-exiting side or a light-entering side of the array substrate.

In yet another aspect, the present disclosure provides a method for driving a display device, the display device including M*N pixel units arranged in an array form, M and N being positive integers, each pixel unit including at least a first pixel subunit A and a second pixel subunit B, the M*N pixel units including at least 2M*N pixel subunits. The method includes:

inputting image information with a resolution of M*N so as to enable the first pixel subunit A and the second pixel subunit B of the pixel unit in an m^(th) row to display identical image information, thereby to achieve 2D image display, m being a positive integer less than or equal to M; and inputting left-eye image information with a resolution of M*(N/2) and right-eye image information with a resolution of M*(N/2), so as to enable the first pixel subunit A of the pixel unit in the m^(th) row and the second pixel subunit B of the pixel unit in an (m−1)^(th) row to display identical image information and enable the first pixel subunit A and the second pixel subunit B of the pixel unit in the m^(th) row to receive different image information, thereby to achieve 3D image display, m being a positive integer greater than 1 and less than or equal to M.

The present disclosure at least has the following advantageous effects. According to the present disclosure, an existing array substrate is improved by dividing one pixel unit into at least two portions, and the parallax baffle with its gratings arranged in a staggered manner, i.e., a fixed grating, is used in conjunction with the array substrate, so as to switch between a 2D display mode and a 3D display mode. In addition, the resolution will not be reduced during the 2D display. As compared with an existing structure where an active barrier is used to implement the 2D/3D display switch, the structure of the present disclosure is simple and easy to be implemented, and the product cost can thus be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view showing the principle for implementing 3D display in the related art;

FIG. 2 is a schematic view showing an existing structure for implementing 2D/3D display switch using an active barrier;

FIG. 3 is a schematic view showing the arrangement of pixel units on an existing display panel;

FIG. 4 is a schematic view showing the arrangement of pixel units on a display panel for implementing the 2D/3D display switch according to one embodiment of the present disclosure;

FIG. 5 is a schematic view showing a partial structure of a parallax baffle according to one embodiment of the present disclosure;

FIG. 6 is a schematic view showing a partial structure of a combination of the parallax baffle and the pixel units in FIG. 4 according to one embodiment of the present disclosure;

FIG. 7 is a schematic view showing a partial structure of the combination of the parallax baffle and the pixel units in FIG. 4 according to another embodiment of the present disclosure;

FIG. 8 is a view showing a partial image region that can be viewed by a left eye during the 2D image display;

FIG. 9 is a view showing a partial image region that can be viewed by a right eye during the 2D image display;

FIG. 10 is a view showing a partial image region that can be viewed by the left eye during the 3D image display; and

FIG. 11 is a view showing a partial image region that can be viewed by the right eye during the 3D image display.

DETAILED DESCRIPTION

In order to make the objects, the technical solutions and the advantages of the present disclosure more apparent, the present disclosure will be described hereinafter in conjunction with the drawings and the embodiments.

According to an array substrate and a display device for implementing 2D/3D display switch of the present disclosure, an existing array substrate is improved by dividing each subpixel into two portions, and a fixed grating is used in conjunction with this structure, so as to switch between a 2D display mode and a 3D display mode. As a result, it is able to simplify the structure of the display device and facilitate the implementation of the structure of the display device, thereby to reduce the production cost.

FIG. 3 is a schematic view showing the arrangement of pixel units on an existing array substrate, and FIG. 4 is a schematic view showing the arrangement of pixel units on the array substrate according to one embodiment of the present disclosure.

As shown in FIG. 4, xA and xB represent a first pixel subunit A 110 and a second pixel subunit B 120 included in the pixel unit in an x^(th) row, respectively, and (x−1) A and (x−1) B represent the first pixel subunit A 110 and the second pixel subunit B 120 included in the pixel unit in an (x−1)^(th) row. Hence, a pixel arrange array of a display panel includes the pixel subunits in rows 1A, 1B, 2A, 2B, . . . , (x−1) A, (x−1) B, xA, xB, . . . , MA and MB, wherein M and N are positive integers, and x is a positive integer greater than 1 and less than or equal to M.

By comparing FIG. 3 with FIG. 4, it can be seen that the array substrate for implementing the 2D/3D display switch in the present disclosure also includes a plurality of pixel units 100 arranged in an array form. However, different from the prior art, each pixel unit 100 of the array substrate in the present disclosure includes the first pixel subunit A 110 and the second pixel subunit B 120 separated from each other, and the first pixel subunit A 110 and the second pixel subunit B 120 are located in an identical column but in two adjacent rows, respectively.

Hence, as compared with the prior art where a display panel includes M*N pixel units and has a resolution of M*N, in the present disclosure, a display panel including at least 2M*N pixel subunits and having a resolution of at least 2M*N will be obtained.

In addition, in the present disclosure, the first pixel subunit A 110 and the second pixel subunit B 120 included in each pixel unit 100 are controlled independently of each other. Shapes, sizes and colors of the first pixel subunit A 110 and the second pixel subunit B 120 may be identical to, or different from, each other, and may be determined in accordance with a design requirement of the array substrate. Alternatively, the first pixel subunit A 110 and the second pixel subunit B 120 are of an identical shape, size and color, so as to simplify the structure of the array substrate and facilitate the manufacture thereof.

The pixel units 100 of the array substrate are arranged with the structure as mentioned above. When the array substrate is used in conjunction with a fixed, step-like parallax baffle, during the 2D display, the first pixel subunit A 110 and the second pixel subunit B 120 of the pixel unit 100 in the m^(th) row display identical image information, wherein m is a positive integer less than or equal to M; and during the 3D display, the first pixel subunit A 110 of the pixel unit 100 in the m^(th) row and the second pixel subunit B 120 of the pixel unit in an (m−1)^(th) row display the identical image information, wherein m is a positive integer greater than 1 and less than or equal to M. In other words, during the 2D display, the first pixel subunit A 110 and the second pixel subunit B 120 belonging to the same pixel unit 100 display the identical image information, while during the 3D display, the first pixel subunit A 110 and the second pixel subunit B 120 belonging to the same pixel unit 100 display different image information. For example, during the 3D display, the first pixel subunit A 110 of the pixel unit 100 in the m^(th) row and the second pixel subunit B 120 of the pixel unit 100 in the (m−1)^(th) row display the identical image information. In this way, it is able to achieve both the 2D image display and the 3D image display, and to view an image in a full resolution manner during the 2D image display.

The principle for implementing the 2D image display and the 3D image display will be described hereinafter when the array substrate of the present disclosure is used in conjunction with the fixed, step-like parallax baffle.

FIG. 5 is a schematic view showing a partial structure of the parallax baffle according to one embodiment of the present disclosure, and FIG. 6 is a schematic view showing a partial structure of a combination of the parallax baffle and the pixel units arranged in a manner as shown in FIG. 4.

Referring to FIGS. 5 and 6, in a display device including the array substrate as shown in FIG. 4, the parallax baffle 200 is used in conjunction with the display panel, so as to implement the 2D/3D display switch. The parallax baffle 200 includes a plurality of opaque parallax barriers 220, and a nonopaque region 210 is formed between two adjacent parallax barriers 220. The parallax barriers 220 and the nonopaque regions 210 are arranged in adjacent rows in a staggered manner, e.g., the parallax barrier 220 in each row is offset by a predetermined offset amount relative to a corresponding parallax barrier 220 in an adjacent row, rather than in a column identical thereto. Similarly, the nonopaque region 210 in each row is also offset by the predetermined offset amount relative to a corresponding nonopaque region 210 in the adjacent row, rather than in a column identical thereto.

The parallax barrier and the corresponding parallax barrier in the adjacent row refer to, as shown in FIGS. 5 and 6, two parallax barriers with a minimum distance from each other in the adjacent two rows along a first horizontal direction of the rows. Similarly, the nonopaque region and the corresponding nonopaque region in the adjacent row refer to two nonopaque regions with a minimum distance from each other in the adjacent two rows along the first horizontal direction of the rows.

As shown in FIG. 6, in this embodiment, the parallax baffle 200 is arranged opposite to the array substrate and at a light-exiting or light-entering side of the array substrate. At least portions of the first pixel subunit A 110 and the second pixel subunit B 120 included in the pixel unit 110 of the array substrate are exposed through the nonopaque regions 210, respectively.

Based on the above, the parallax barrier 220 of the parallax baffle 200 shields at least portions of the adjacent first pixel subunit A 110 and second pixel subunit B 120 in an identical column, and the shielded first pixel subunit A 110 and second pixel subunit B 120 belong to different pixel units 100. Meanwhile, when the parallax barrier 220 shields at least portions of the adjacent first pixel subunit A 110 and second pixel subunit B 120 in a (y−1)^(th) column, it will also shield at least portions of the adjacent first pixel subunit A 110 and second pixel subunit B 120 in a y^(th) column, and the shielded first pixel subunit A 110 and second pixel subunit B 120 in the y^(th) column belong to different pixel units 100.

For example, as shown in FIG. 6, the parallax barrier 220 corresponds to a portion of the first pixel subunit A 110 of the pixel unit in an x^(th) row and a (y−1)^(th) column and a portion of the second pixel subunit B 120 of the pixel unit in an (x−1)^(th) row and the (y−1)^(th) column, wherein x and y are positive integers greater than 1 and less than or equal to M. In addition, the parallax barrier 220 further corresponds to a portion of the first pixel subunit A 110 of the pixel unit in the x^(th) row and a y^(th) column and a portion of the second pixel subunit B 120 of the pixel unit in the (x−1)^(th) row and the y^(th) column.

Referring again to FIG. 6, by taking parts of the pixel units as an example, when the parallax baffle 200 is adopted, the pixel subunits (x−1)B and XA are set as a group and correspond to a group of gratings, i.e., a group of nonopaque regions 210 and parallax barriers 220. The parallax barrier 220 shields portions of the pixel subunits (x−1)B and the pixel subunits xA which are located in the (y−1)^(th) column but do not belong the same pixel unit. As also shown in FIG. 6, the parallax barrier 220 further shields portions of the pixel subunits (x−1)B and the pixel subunits xA which are located in the y^(th) column but do not belong to the same pixel unit.

In addition, in the present disclosure, the parallax barrier 220 has a height equal to a sum of heights of the first pixel subunit A 110 and the second pixel subunit B 120. The parallax barriers 220 in the adjacent rows are arranged in a staggered manner on the parallax baffle 200, and the parallax barrier 220 in each row is offset by an offset amount P relative to the corresponding parallax barrier in the adjacent row. Similarly, the nonopaque region 210 in each row is also offset by the offset amount P relative to the corresponding nonopaque region in the adjacent row. In this embodiment, the offset amount P is half a width of a grating unit, and the width of the grating unit is equal to a sum of widths of the parallax barrier 220 and the nonopaque region 210. Illustratively, as shown in FIGS. 5 and 6, the parallax barriers 220 in odd rows are arranged in a column, and the parallax barriers 220 in even rows are arranged in a column. Similarly, the nonopaque regions 210 in odd rows are arranged in a column, and the nonopaque regions 210 in even rows are arranged in a column.

When the 3D display device has two viewpoints, one pixel unit includes two pixel subunits, and the offset amount P may be set as identical to a width of the pixel subunit.

As shown in FIG. 7, when the 3D display device has 5 viewpoints, one pixel unit may include 5 pixel subunits. The parallax barriers in the adjacent rows are arranged in a staggered manner on the parallax baffle, and the parallax barrier in each row is offset by the offset amount P relative to the corresponding parallax barrier in the adjacent row. Similarly, the nonopaque region in each row is also offset by the offset amount P relative to the corresponding nonopaque region in the adjacent row. In this embodiment, the offset amount P may be set as greater than or equal to a width of one pixel subunit and less than widths of five pixel subunits.

In other words, when the 3D display device has multiple viewpoints, e.g., S viewpoints, one pixel unit may include S pixel subunits, and the offset amount P may be set as greater than or equal to a width of one pixel subunit and less than widths of S pixel subunits, wherein S is a positive integer. Alternatively, the offset amount P may be an integral multiple of the width of one pixel subunit. By using the above-mentioned arrangement mode, it is able to enhance the resolution during the 3D display.

In addition, widths of the parallax barrier 220 and the nonopaque region 210 on the parallax baffle and the relationship therebetween are designed in a manner so as to meet the requirements of the 3D image display. This part belongs to a well-known technique in the art, and will not be particularly defined herein.

Based on the combination of the array substrate and the parallax baffle 200 with the mentioned structures, the present disclosure further provides a display device capable of implementing 2D/3D display switch. Referring to FIG. 6, the display device includes:

the array substrate including a plurality of pixel units 100 arranged in an array form, each pixel unit including the first pixel subunit A 110 and the second pixel subunit B 120 separated from each other, the first pixel subunit A 110 and the second pixel subunit B 120 being located in an identical column and in two adjacent rows, respectively; and

the parallax baffle 200 arranged opposite to the display panel and at the light-exiting or light-entering side of the array substrate, the parallax baffle 200 including a plurality of nonopaque regions 210 and parallax barriers 220 arranged in a staggered manner, and at least portions of the first pixel subunit A 110 and the second pixel subunit B 120 being exposed through the nonopaque region 210, respectively.

The principle of the display device capable of implementing both 2D image display and 3D image display will be described hereinafter.

During the 2D image display, the 2D image information with a resolution of M*N is inputted so as to enable the first pixel subunit A 110 and the second pixel subunit B 120 of the pixel unit 100 in the m^(th) row to display the identical image information, thereby to achieve the 2D image display, wherein m is a positive integer less than or equal to M. In other words, gate electrodes corresponding to the first pixel subunit A 110 and the second pixel subunit B 120 in an identical row are turned on simultaneously, so as to enable the first pixel subunit A 110 and the second pixel subunit B 120 of the pixel unit 100 in the identical row to display the same contents. When the image is viewed by a viewer through the parallax baffle 200, an image region viewed by his left eye is shown in FIG. 8, and an image region viewed by his right eye is shown in FIG. 9.

Referring to FIGS. 8 and 9, for the image with a resolution of M*N, the image information can be viewed by both the left and right eyes during the 2D image display, but a lower right corner or an upper right corner of the pixel unit can merely be viewed by the right eye and an upper left corner or a lower left corner of the pixel unit can be merely viewed by the left eye. Hence, different image information are viewed by the left and right eyes, respectively, and the entire image information are viewed by the viewer. In addition, the images with a resolution of M*N can be viewed by both the left and right eyes, so the resolution will not be reduced during the 2D image display.

During the 3D image display, left-eye image information with a resolution of M*(N/2) and right-eye image information with a resolution of M*(N/2) are inputted in accordance with the arrangement mode, so as to enable the first pixel subunit A 110 of the pixel unit 100 in the m^(th) row and the second pixel subunit B 120 of the pixel unit in the (m−1)^(th) row to display identical image information, and enable the first pixel subunit A 110 and the second pixel subunit B 120 of the pixel unit 100 in the m^(th) row to receive different image information, thereby to implement the 3D image display, wherein m is a positive integer greater than and less than or equal to M. When an image is viewed by the viewer through the parallax baffle, an image region viewed by the left eye is shown in FIG. 10, and an image region viewed by the right eye is shown in FIG. 11.

Referring to FIGS. 10 and 11, for the image with a resolution of M*N, the image with a resolution of M*(N/2) can be viewed by the left and right eyes during the 3D image display, and this image is the same as that for autostereoscopic 3D display.

According to the 3D display device of the present disclosure, the improved array substrate is used in conjunction with the parallax baffle with the above-mentioned structure, i.e., the fixed grating, so as to implement the 2D/3D display switch. In addition, the resolution will not be reduced during the 2D display. As compared with an existing structure where an active barrier is used to implement the 2D/3D display switch, the structure of the present disclosure is simple and easy to be implemented, and the product cost can thus be reduced.

The 3D display device of the present disclosure may be a liquid crystal display device. It should be appreciated that, the parallax baffle may be arranged at the light-exiting side or the light-entering side of the array substrate. Of course, the display device may also be an organic light-emitting diode (OLED) display device, and at this time, the parallax baffle is arranged at the light-exiting side of the array substrate.

The present disclosure further provides a method for driving the above-mentioned display device. The display device includes M*N pixel units arranged in an array form, each pixel unit includes the first pixel subunit A and the second pixel subunit B, the M*N pixel units includes at least 2M*N pixel subunits, and M and N are both positive integers. The method includes:

inputting image information with a resolution of M*N so as to enable the first pixel subunit A and the second pixel subunit B of the pixel unit in the m^(th) row to display identical image information, thereby to achieve 2D image display, m being a positive integer less than or equal to M; and

inputting left-eye image information with a resolution of M*(N/2) and right-eye image information with a resolution of M*(N/2), so as to enable the first pixel subunit A of the pixel unit in the m^(th) row and the second pixel subunit B of the pixel unit in an (m−1)^(th) row to display identical image information and enable the first pixel subunit A and the second pixel subunit B of the pixel unit in the m^(th) row to receive different image information, thereby to achieve 3D image display, m being a positive integer greater than 1 and less than or equal to M.

By using the above-mentioned method, when a 2D control signal is inputted, the 2D image display will be achieved, and when a 3D control signal is inputted, the 3D image display will be achieved. As a result, it is able to switch between a 2D display mode and a 3D display mode.

The above are merely the preferred embodiments of the present disclosure. It should be noted that, a person skilled in the art may make further improvements and modifications without departing from the principle of the present disclosure, and these improvements and modifications shall also fall within the scope of the present disclosure. 

1. An array substrate for implementing 2D/3D display switch, comprising M*N pixel units arranged in an array form, M and N being positive integers, wherein each pixel unit comprises at least a first pixel subunit A and a second pixel subunit B, and the M*N pixel units include at least 2M*N pixel subunits, during the 2D display, the first pixel subunit A and the second pixel subunit B of the pixel unit in an m^(th) row display identical image information, m is a positive integer less than or equal to M, and during the 3D display, the first pixel subunit A of the pixel unit in the m^(th) row and the second pixel subunit B of the pixel unit in an (m−1)^(th) row display identical image information, and m is an integer greater than 1 and less than or equal to M.
 2. The array substrate according to claim 1, wherein in each pixel unit, the first pixel subunit A and the second pixel subunit B are of an identical shape, size, and color to be displayed.
 3. The array substrate according to claim 1, wherein the shape, size and color to be displayed of the first pixel subunit A and the second pixel subunit B are determined in accordance with a design requirement of the array substrate.
 4. A display device for implementing 2D/3D display switch, comprising: an array substrate including M*N pixel units arranged in an array form, M and N being positive integers, each pixel unit including at least a first pixel subunit A and a second pixel subunit B, the M*N pixel units including at least 2M*N pixel subunits, during the 2D display, the first pixel subunit A and the second pixel subunit B of the pixel unit in an m^(th) row displaying identical image information, m being a positive integer less than or equal to M, during the 3D display, the first pixel subunit A of the pixel unit in the m^(th) row and the second pixel subunit B of the pixel unit in an (m−1)^(th) row displaying identical image information, and m being an integer greater than 1 and less than or equal to M; and a parallax baffle arranged opposite to the array substrate and including a plurality of opaque parallax barriers, a nonopaque region being formed between two adjacent parallax barriers, the parallax barriers in adjacent rows being arranged in a staggered manner, the parallax barrier corresponding to a portion of the first pixel subunit A of the pixel unit in an x^(th) row and a (y−1)^(th) column and a portion of the second pixel subunit B of the pixel unit in an (x−1)^(th) row and a (y−1)^(th) column, x and y being each an integer greater than 1 and less than or equal to M.
 5. The display device according to claim 4, wherein the parallax barrier further corresponds to a portion of the first pixel subunit A of the pixel unit in the x^(th) row and a y^(th) column and a portion of the second pixel subunit B of the pixel unit in the (x−1)^(th) row and the y^(th) column.
 6. The display device according to claim 4, wherein the parallax barrier has a height equal to a sum of heights of the first pixel subunit A and the second pixel subunit B.
 7. The display device according to claim 4, wherein the parallax barrier in each row is offset by a predetermined offset amount relative to a corresponding parallax barrier in an adjacent row.
 8. The display device according to claim 7, wherein the parallax barrier and the corresponding parallax barrier in the adjacent row are two parallax barriers with a minimum distance from each other in the adjacent two rows along a horizontal direction of the rows.
 9. The display device according to claim 7, wherein the predetermined offset amount is half a width of a grating unit, and the width of the grating unit is equal to a sum of widths of the parallax barrier and the nonopaque region.
 10. The display device according to claim 7, wherein when the display device has S viewpoints, the predetermined offset amount is greater than or equal to a width of one pixel subunit and less than widths of S pixel subunits, and S is a positive integer.
 11. The display device according to claim 4, wherein the parallax barrier is arranged at a light-exiting side or a light-entering side of the array substrate.
 12. A method for driving a display device, the display device including M*N pixel units arranged in an array form, M and N being positive integers, each pixel unit including at least a first pixel subunit A and a second pixel subunit B, the M*N pixel units including at least 2M*N pixel subunits, the method comprising: inputting image information with a resolution of M*N so as to enable the first pixel subunit A and the second pixel subunit B of the pixel unit in an m^(th) row to display identical image information, thereby to achieve 2D image display, m being a positive integer less than or equal to M; and inputting left-eye image information with a resolution of M*(N/2) and right-eye image information with a resolution of M*(N/2), so as to enable the first pixel subunit A of the pixel unit in the m^(th) row and the second pixel subunit B of the pixel unit in an (m−1)^(th) row to display identical image information and enable the first pixel subunit A and the second pixel subunit B of the pixel unit in the m^(th) row to receive different image information, thereby to achieve 3D image display, m being a positive integer greater than 1 and less than or equal to M.
 13. The display device according to claim 5, wherein the parallax barrier has a height equal to a sum of heights of the first pixel subunit A and the second pixel subunit B.
 14. The display device according to claim 5, wherein the parallax barrier in each row is offset by a predetermined offset amount relative to a corresponding parallax barrier in an adjacent row.
 15. The display device according to claim 6, wherein the parallax barrier in each row is offset by a predetermined offset amount relative to a corresponding parallax barrier in an adjacent row.
 16. The display device according to claim 13, wherein the parallax barrier in each row is offset by a predetermined offset amount relative to a corresponding parallax barrier in an adjacent row.
 17. The display device according to claim 5, wherein the parallax barrier is arranged at a light-exiting side or a light-entering side of the array substrate.
 18. The display device according to claim 6, wherein the parallax barrier is arranged at a light-exiting side or a light-entering side of the array substrate.
 19. The display device according to claim 13, wherein the parallax barrier is arranged at a light-exiting side or a light-entering side of the array substrate. 